FORT BRAGG, N.C. — A military jury on Monday acquitted a sergeant on the most serious charges in the death of Pvt. Danny Chen, a Chinese-American from Manhattan who killed himself last year while deployed in Afghanistan.

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The verdicts suggested that prosecutors had difficulty convincing the military jury that Sergeant Holcomb’s treatment of Private Chen, which the prosecutors said included brutal hazing and racial taunts, had led directly to the private’s suicide.